Fluid motor construction for valves or the like



Nov. 13, 1951 C, B, NES 2,574,574

FLUID MOTOR CONSTRUCTION FOR VALVES OR THE LIKE Filed April 25, 1945 Y `IN ENTOR Q/FFO/Q /VES ATTORNEY Patented Nov. 13, 1951 UNITED STATES maar OFFICE FLUID MOTOR CONSTRUCTION FOR VALVES OR THE LIKE Application April 25, 1945, Serial No. 590,190

15 Claims. 1

This invention relates to diaphragm motor construction operable in response to fluid pressure.

One of the objects of this invention is to provide a simple, efficient, and practical duid-responsive diaphragm motor that will be of dependable and long-lasting, eicient action.

Another object is to provide a motor of the above-mentioned character that can be constructed of readily fabricated and relatively inexpensive, individual parts capable of ease and dependability of assembly. Another object is to provide a motor of the above-mentioned character in which a dependable sealed junction between the flexible diaphragm and its companion chamber-forming casing part may be achieved in a simple, inexpensive, and thoroughly practical manner. Another object is to provide, in a pressure-responsive diaphragm motor of the abovementioned character, a simple, practical, and inexpensive self-sealing mounting or assembly of the flexible diaphragm element that will be capable of dependable and long-lasting action, An-

` my invention:

Fig. 1 is a side elevation of a huid-responsive diaphragrnmotor shown, by way of illustration, as related to a valve to operate the latter;

Fig. 2 is a vertical sectional view as seen along vthe line 2-2 of Fig. l; and

Fig. 3 is a fragmentary elevation, as seen along the line 3-3 of Fig. 1, showing certain features of the construction for achieving self-sealing assembly of the iiexible diaphragm.

Similar reference characters refer to similar parts throughout the several views of the drawings.

The structure comprises preferably a frame, generally indicated by the reference character I0, which may be built up of several partsillustratively a tubular frame part I I conveniently vmade of relatively thin material, such as steel tubing, and, because of its cross-sectional form,

having good rigidity, and havin-g lower and upper annular members I2 and I3, of which the member I2 may be tted internally of the tube member I I, and welded thereto, as at I4, and the upper frame member I3 is annular and fitted about the upper end of the part II to which it may be welded, as at I5. The upper part I3 may be in the form of a suitably heavy stamping and is ared outwardly and upwardly to provide an cuter peripheral flange I3et which is to take part in forming a seat for a flexible diaphragm generally indicated by the reference character I6. The built-up frame I0 takes part in supporting and guiding for movement a main operating stem I? positioned substantially along the axis of the tube part I I and having threaded thereto, at its upper end, and locked by a lock nut I8, a disk-like plate IS, the upper circular face of which may be curved and rounded over peripherally, as indicated, so as to present an appropriate and large area against which a large central portion of the diaphragm IG is seated to exert downward pressure or force, in a manner later described, under the action of fluid under pressure acting against the upper face of the diaphragm I6; the plate I9, on its under face, is suitably machined, as at Ida, to form an annular seat for the upper end of a helical spring 2I which biases the plate I9 upwardly against the action of the downward force of the fluid under pressure acting upon the diaphragm I-6.

Suitable means are provided to support the lower end of the spring 2|, as are also provided means for adjusting the compression of the spring so as thereby to set the standard at which the fluid pressure diaphragm motor is to operate, and, conveniently and preferably, these two means are combined. In the illustrative and preferred form I provide a relatively heavy, annular member or collar 22 that fits inside of the tube frame part II to which it is readily secured at a suitable point intermediate of the length of the part II, as by screws 23 which may, if desired, be of the kind that are of large pitch of thread and, upon being driven home into suitable holes drilled in the collar 22, cut corresponding, high-pitch thread-ways into the metal of the collar 22. The latter is thus readily secured in place and can take part in enhancing the rigidity of the built-up frame I0.

The collar 22 is internally threaded to receive an elongated, hollow or annular screw 24 through the bore of which the vertically movable, operating stem I'I extends. The upper external part of the screw 24 is turned or otherwise machined to provide a horizontal shoulder or seat of substantial area, against which seats or rests an annular thrust plate 26 between which and an annular spring-supporting plate 2l is received an annular bearing structure 2S, to reduce frictional resistance to relative rotary movement between the plates 2@ and 2, and preferably this bearing structure is of the so-called anti-friction bearing type and may comprise balls Sil and a suitable annular cage 3l therefor.

IThe spring-supporting plate 2l is shaped, as at 27a, to provide a suitable annular seat for receiving the lower end of the spring 2l and for substantially aligning it coaxially of the structure. The upper face of the thrust plate 2S is also suitably shaped to provide it with an annular seat or raceway 26a, against one face of which the rolling members 30 of the anti-friction bearing 28 rest and the other face of which in effect centers the bearing structure 28 relative to the thrust plate 26 itself. The under face of the spring plate 2 rests against the rolling members 30, as appears from Fig. 2.

The lower end of the hollow, elongated screw 24 is provided with a suitable number of radially extending recesses 32, their axes extending like the spokes of a wheel, whereby, by the step-bystep insertion of a suitable rod or tool, the screw 24 may be threaded upwardly or downwardly to increase or lessen the compression of the spring 2|, the tubular casing part II being cut away, as at I Ia (Fig. 1), to provide access to the interior of the lower end ofthe tubular frame part II, and the opening I I may be normally closed over by a cover plate 33 suitably secured detachably, as by screws 34.

Rotary movement of the adjusting screw 24 will be seen to be facilitated by the anti-friction bearing structure 28, which also facilitates ease of rotary movement of the spring plate 2l to accompany rotary motion of the lower end of the spring during changes in compression of the latter during operation of the motor.

rIhe motor stem I'I may be connected in any suitable or desired way to actuate any desired device or mechanism, illustratively the valve member 36 of a valve generally indicated by the reference character 'l--and an illustrative operating connection may comprise a valve stem 3S connected to the valve member 36 and extending upwardly through a stuilng box construction generally indicated at 39, and, in such case, the casing of the valve structure 3l may also be made to support the entire motor structure, and this may be done in a manner so as to utilize the sliding bearing or stuffing box structure of the valve as the lower guide for the connected-together motor stem IT and valve stem 38. The latter may be coaxially secured together in any suitable way, as by threading the valve stem 38 into a threaded hole Ila in the motor stem I'I, thus forming also a connection of adjustable length which may be locked, as by one or more lock nuts 4 I. To facilitate such an arrangement, the annular end plate I2 of the frame I has an internal diameter to take over the stufng box structure and to be slidably received about the cylindrical extension 31a of the valve casing, thus to insure concentricity of the parts, the end plate I2 of the frame IU resting against a shoulder 3Ib of the valve casing against which it is securely clamped by a capstan nut 42 in threaded connection with the threaded upper portion of the cylindrical valve casing part 31a. The capstan nut 42 may be operated step by step through the casing opening IIa above described, by the insertion therethrough of a suitable tool.

The diaphragm I6, which is preferably made of any suitable impervious, flexible materialsuch as suitably compounded and vulcanized natural rubber, synthetic rubber, or the like-is preferably preformed in any suitable way, as by molding the unvulcanized compound in a suitable mold, followed by vulcanization, to have a peripheral flange I6a that is turned, throughout its enentire peripheral extent, back upon the diaphragm, though somewhat spaced therefrom, as is shown in Fig. 2. These portions of the diaphragm are preferably shaped so that externally the overor inturned ange I6:L presents a continuous peripheral face that is convex, as at Ib, and to present internally a continuous peripheral face or surface that is concave, as at I6, The concave surface |50 receives therein the continuous peripheral flange portion 44a of what may be termed a diaphragm plate 44 which may be more or less disk or dome shaped and which is to form with the diaphragm a closed chamber to which the motor-operating fluid is supplied, as by a pipe or conduit 45 which may be threaded to a bushing 4S welded, as at 47, into sealed connection with the diaphragm plate 44, the lower, annular, end face 43a of the bushing 46 being coaxial with the frame structure Iil and being thus aligned with the axis of the motor stem H and serving as a stop limiting upward movement of the diaphragm thrust plate I9 under the action of spring 2l. Such limiting movement is appropriated when the motor mechanism is at rest and the action of the spring ZI is unopposed by fluid under pressure in the chamber formed by the diaphragm It and end cap or dome 44; radial passages 46b in the bushing 45 maintain communication between the chamber and the conduit 45, and thus ready the structure for operation during such inactive or at-rest condition of the motor.

The upper and lower diaphragm plates I3 and 44, both of which may be in the form of pressed steel or stamped parts, have preferably similar outside diameters and are shaped to provide outermost portion I3:t and 44a that are of substantial radial dimension and substantially parallel to each other so as to present relatively large, annular surfaces to the two faces of the diaphragm I6 which they respectively engage. The overturned flange portion I6a of the diaphragm materially overlies the flange 44a of the upper diaphragm plate 44, having in effect a radially inwardly extending lip portion ItE of suitable radial dimension for that purpose.

I now provide suitable means `to maintain the assembly of the parts 44, I6, and I3 in a manner to form a dependable seal between the upper diaphragm plate and the diaphragm I6 which form the pressure-responsive chamber, and preferably do so in a manner to cause the pressure of the fluid in the chamber to take part in maintaining that sealed connection. A preferred and illustrative means for doing this comprises a readily contractible means, generally indicated by the reference character 48, which is of simple and inexpensive construction, easy to apply, and uniquely and dependably coacting to insure longlasting mechanical assembly and sealing action. For greater convenience of manufacture and assembly I prefer to make up the means 48 of several parts, each preferably identically constructed and dimensioned-illustratively of two parts, indicated at 49 and 50 in Fig. 1, and of which one of those parts-namely, part 50-ls shown in Fig. 2. When made in two parts, each is of substantially 180 degrees extent so as to peripherally envelope completely the superimposed and overlying parts |3a, I6, 44a, and |68. In cross-section the parts 49 and 50 are suitably shaped to encompass the just-named superirnposed parts, and preferably do so with an action, when the several parts 49 and 5l] are drawn together, to lessen .their circumferential extent; that action draws or forces these superimposed parts together, the yieldability or resiliency of the portions of the diaphrag-m affected thereby coacting to permit rthese actions to take place.

Conveniently and preferably the parts 49 and 50 are curved in cross-section (see Fig. 2), and this curvature may be of any suitable character to effect compression of the above-mentioned superimposed parts one against the other, in a ver-tical direction, as `seen in Fig. 2, in response to radial inward movement of the parts 49 and 50. This cross-section, by way of illustration, may be arcuate, facilitating manufacture of the parts out f heavy sheet metal or the like.

Adjacent ends of the several parts of the device 48 are provided with suitable means for drawing them together, or for forcing the several parts 49 and 50 radially inwardly so as to bring the wedge-like internal or convex faces thereof into action upon the superimposed parts of the two diaphragm plates i3 and 44 and of the diaphragm I6. Such means may comprise lugs or ears 5| and 52, at the adjacent ends of the parts 49 and 50, which extend outwardly from the parts 49 and 50 into substantial parallelism, being suitably apertured to freely receive therethrough Ithe threaded shank 53a of a bolt 53 by which the adjacent ends of the parts 49 and 59 may be drawn toward each other. The lugs 5I and 52, for convenience in manufacture, are preferably separately constructed and then attached, forming preferably .the cross-part of relatively heavy U-shaped metal parts which may be inexpensively pressed or stamped into the desired shape, the side arms of these U-shaped parts, as is better shown in Fig. l, being spaced from each other suiciently to receive therebetween the substantially parallel upper and lower portions of the part 49 or 5D, asthe case may be. Preferably, also, the lugs 5I and 52 are formed at their inner edges 5la and 52ev (see Fig. 2) to match the external curvature of the parts 49 and 50 to which they may be welded or otherwise secured along their just-mentioned curved edges.

As better appears in Fig. 3, the spaced arm portions 5Ib and 5I, that are integral with the lug 5| and the spaced side portions 52b and 52C, that are integral with the lug 52, are given a suitable curvature to follow the curvature of the parts 49 and 5U to which they are secured in any suitable way, as by welding; thus, the welding may be effected where the curved edges of the spacedl arms are respectively aligned with the curved edges of the parts 49 and 5|), as indicated at W.

With such a construction, the lugs 5I and 52 are strongly supported against bending, and the tensional forces effected by the bolts 53-which are two in number, where the device 48 is made up of two parts 49 and 5l'l-are thus dependably transmitted to the adjacent ends presented by the device 48, these ends, as shown in Fig. 1, preferably extending .toward each other beyond the lugs 5I and 52.

The nut 53h of bolt 53 abuts against one of these lugs, being amply accommodated between thespaced-arms, and preferably-the bolt 53 is provided with a long, larger-diametered shank 53c--the one end of which abuts against the other lug, and the other end of which is conformed to provide a head 53e, so that a suitable tool, such as a wrench, may be applied theretothe length of the shank 53, in conjunction with the shape of the bracing arms 511 and 5I,

. bringing the head 53e, as is better shown in Fig.

3, well out into the clear where it may be easily manipulated by the wrench.

The device 48 is thus made contractible in a generally radial, inward direction upon manipulation of one or more of the bolts to bring adjacent ends closer to each other and thus to lessen the effective circumferential dimension of the device 48, which, if desired, can have suicient springiness or yieldability to accommodate itself appropriately to change in radius of curvature. The device 48, when thus contracted suitably, causes the superimposed multiple parts E33, I6, 44a, and i6e to be in effect wedged tightly together in a vertical or axial direction, thus effecting a dependable sealing of the fluidresponsive chamber where the diaphragm part of it and the rigid casing part of it are in engagement with each other. Thus a substantial annular area of the diaphragm l5 may be vertically compressed between the seat-forming portions 53a and 44E of the parts I3 and 44, respectively, and, where the diaphragm has an overturned peripheral lip, such as the lip 16e, that action of compression is accompanied by compression of the lip ite between the part or parts of the device 48 and the portion 44ab of the metal part 54, thus effecting another annular area of seal. These actions in turn can be accompanied by a compression radially inwardly of the substantially vertical portion 16a of the diaphragm l5 against the appropriately rounded-over and relatively thick peripheral edge of the part 44a, thus eifecting another annular area of seal.

rIhe iiuid under pressure in the chamber formed by the diaphragm l and part 44 may :I thus be dependably maintained sealed throughout the action of the motor in actuating the operating stem l 1 -3B in response to the conjoint action of the pressure of the fluid in the chamber and of the spring 2|. Where the construction employs the over-turned lip I6e to overlie the outer annular portion of the companion chamber-forming part, such as the flange 44a of the part 44, I am enabled, according to my invention, to utilize the pressure effect of the fluid in the chamber to achieve and maintain dependable seal. Referring to Fig. 2, the reaction of the fluid under pressure in the chamber Iii-44 is not only in a desired direction upon the diaphragm I5, but also is an upper reaction upon the part 44 against the substantial area of which the fluid under pressure exerts its force, tending to raise or push upwardly the part 44 itself. Hence substantial upward force is transmitted through the ange portion 44a, in an upward direction against the diaphragm lip I6@ to compress the lip against the internal walls of the device 43, the adjacent edges of which are brought closely together so as to form substantial or appropriate continuity of internal surface against which the lip 15e is supported. The tightness of the resultant sealing action is thus of a high order, the force available to insure its presence being a function of the product of the area of the part 44 by the pressure per unit area of the huid in the chamber. Moreover, when the motor is in an at-rest position, so that the spring 2l is unopposed by fluid under pressure-so that the innerl end of the bushing 46 forms a limiting stop for upward movement of the stem l? and the thrust plate lil-the force of the spring 2l in such expanded condition is exerted upwardly against the chamber plate 44 and the just-described sealing action is continued or maintained, holding the fluid chamber in readiness for the subsequent admission of fluid under pressure. These several actions are preferably made use of supplemental to one or more of the sealing actions otherwise eifected by the construction, as earlier above described, and the resultant self-sealing makes for lessening maintenance and supervision and contributes toward long-lasting reliability of operation of the motor.

The construction, moreover, achieves numerous other practical advantages. For example, should it be desired to replace the diaphragm i6, the device 48 is easily and quickly dissembled and removed, whence the part d and diaphragm i6 may be simply lifted olf, the diaphragm replaced, and the parts easily and quickly reassembled. In operations of assembly or dissembly, where the device 48 is made up of two or more parts, one or more of the detachable connections, such as the bolts 53, need not be dissembled and need only `be appropriately loosened up. For example, where the device t8 comprises two parts-and, hence, has two connecting bolts one of them, for purposes of assembly or dissembly, may be completely disconnected or removed and the other simply loosened up sufficiently so that, in coaction with some looseness of the bolt in the holes in the lugs 5l and 52, the loose connection can function somewhat as a hinge so as to open up the device i8 for removal from or assembly to the parts with which it normally coaots. The tightening up of the bolt or bolts, due to the coaction of the device d3 with the other parts, causes the articulated part :i8 to be substantially self-aligning or self-centering with respect to its coacting parts and thus make for facility and ease of handling.

It will thus be seen that there has been provided in this invention a construction in which the various objects, together with many thoroughly practical advantages, are successfully achieved.

As many possible embodiments may be made of the above invention and as many changes might be made in the embodiment above set forth, itis to be understood that all matter hereinbefore set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I claim:

1. A diaphragm motor construction comprising a flexible diaphragm adapted to forni one wall of fluid pressure chamber, means co-mplernental to the diaphragm adapted to form therewith said chamber, said complemental means having a peripheral portion overlying an outer portion of the diaphragm and the diaphragm having an overturned portion of non-metallic relatively yieldable material adapted under pressure to conform itself in sealing relation to an adjacent part and said overturned portion providing a lipl overlying said peripheral portion, and means supporting said peripheral portion and said lip and having a part that overlies said lip and against which the force of iiuid under pressure in said chamber, by its reaction upon said complemental means,

Il f

8 causes said peripheral portion to press the lip into sealing relation therewith.

2. A diaphragm motor construction :comprising a exible diaphragm adapted to form one wall oi a fluid pressure chamber, means complemental to the diaphragm adapted to form therewith said chamber, said complemental means having a peripheral portion overlying an outer portion of the diaphragm and the diaphragm having an overturned portion of non-metallic relatively yieldable material adapted under pressure to conform itself in sealing relation to an adjacent part and said overturned portion providing a lip overlying said peripheral portion, a support having a part providing a, seat for said diaphragm in juxtaposition to said peripheral portion whereby said diaphragm extends between said seat-forming part and said peripheral portion, and means enveloping and holding against dissembly said last-mentioned three parts and said diaphragm lip.

3. A diaphragm motor construction comprising a flexible diaphragm adapted to form one Wall of a iluid pressure chamber, means lcomplemental to the diaphragm adapted to form therewith said chamber, said coniplemental means having a peripheral portion overlying an outer portion of the diaphragm and the diaphragm having an overturned portion of non-metallic relatively yieldable material adapted under pressure to conform itself in sealing relation to an adjacent part and said overtiu'ned portion providing 9, lip overlying said peripheral portion, a support having a part providing a seat for said diaphragm in juxtaposition to said peripheral portion whereby said diaphragm extends between said seat-forming part and said peripheral portion, whereby said lip, said peripheral portion, said seat-forming portion, and the interposed diaphragm are superimposed one upon another, and means clamping said superimposed parts together and placing said outer portion of the diaphragm and also said lip in sealing compression.

e. A diaphragm motor construction comprising a flexible diaphragm adapted to form one wall of a fluid pressure chamber, means coinplemental to the diaphragm adapted to form therewith said chamber, said complemental means having a peripheral portion overlying an outer portion of the diaphragm and the diaphragm having an overturned portion of non-metallic relatively yieldable material adapted under pressure to conform itself in sealing relation to an adjacent part and said overturned portion providing a lip overlying said peripheral portion, a support having a part providing a seat for said diaphragm in juxtaposition to said peripheral portion whereby said diaphragm extends between said seat-forming part and said peripheral portion, whereby said lip, said peripheral portion, said seat-forming portion, and the interposed diaphragm are superimposed one upon another, and means peripherally enveloping said superimposed parts and presenting a substantially wedge-shaped peripheral recess to the latter to receive them therein and having means to draw it inwardly to cause said wedge-shaped recess to clamp said superimposed parts together and to coact to draw said lip inwardly relative to said peripheral portion.

5. A diaphragm motor vconstruction comprising a flexible diaphragm adapted to forni one wall of a fluid pressure chamber, means complemental to the diaphragm adapted to form therewith said chamber, said complemental means having a, peripheral portion overlying an outer portion of the diaphragm and the diaphram having an overturned portion of non-metallic relatively yieldable material adapted under pressure to conform itself in sealing relation to an adjacent part and said overturned portion providing a lip overlying said peripheral portion, a support having a part providing a seat for said diaphragm in juxtaposition to said peripheral portion whereby said diaphragm extends between said seat-forming part and said peripheral portion, whereby said lip, said peripheral portion, said seat-forming portion, and the interposed diaphragm are superimposed one upon another, and means holding said superimposed parts against separation and operating to compress a portion of the diaphragm against and into sealing relation with the outer edge of said peripheral portion of said complemental means.

6. A diaphragm motor of the charactell described comprising a disk-like diaphragm of yieldable non-metallic material and peripherally turned over upon itself to provide an overlying annular lip, means adapted to form with said means for supporting and holding together said flange and the enveloping portions of said diaphragm and providing annular means against which said lip is pressed by said flange in response to pressure exerted internally against said first-mentioned means thereby increasing the sealing engagement between said lip and said flange.

7. A construction as claimed in claim 6 in which said part to be operated by said diaphragm comprises means having a spring opposing action of the fluid under pressure upon said diaphragm, said first-mentioned means being positioned in the path of movement thereof under the action of said spring whereby, upon absence of iluid under pressure in said chamber, said spring exerts pressure internally upon Said first-mentioned means and thereby effects compression of said lip by said flange.

8. A diaphragm motor of the character described comprising a disk-like diaphragm made of flexible non-metallic relatively yieldable material and peripherally turned over upon itself to provide an overlying annular lipy means adapted to form with said diaphragm a closed pressureresponsive chamber and presenting an annular peripheral ange received between said lip and .an adjacent annular portion of the diaphragm whereby said flange is throughout its peripheral extent enveloped by a portion of the diaphragm, and supporting means having an annular portion to form a seat for said diaphrag-m on the other side from and in juxtaposition to said flange and having annular means overlying said lip and between which and said flange said lip is compressed.

9. A diaphragm motor of the character described comprising a disk-like diaphragm made of a exible non-metallic relatively yieldable material and peripherally turned over upon itself to provide an overlying annular lip, means adapted to form with said diaphragm a closed pressureresponsive chamber and presenting an annular peripheral flange received between said lip and an adjacent annular portion of the diaphragm whereby said flange is throughout its peripheral extent enveloped by a portion of the diaphragm, and supporting means having an annular portion to form a seat for said diaphragm on the other side from and in juxtaposition to said flange and having means :clamping said lip, said ange, annular portion of the diaphragm, and said annular seat-forming means together.

1-0. A diaphragm motor of the character described comprising a disk-like diaphragm made of a flexible non-metallic relatively yieldable material and peripherally turned over upon itself to provide an overlying annular lip, means adapted to form with 'said diaphragm a closed pressure-responsive chamber and presenting an annular peripheral flange received between said lip and an adjacent annular portion of the diaphragm whereby said ange is throughout its peripheral extent enveloped by a portion of the diaphragm, and supporting means having an annular portion to form a seat for said diaphragm on the other side from and in juxtaposition to said flange and having readily attachable radially contractible means enveloping the superimposed annular parts with means for radially contracting it to effect a seal between said flange and the diaphragm.

11. A diaphragm motor of the character described comprising a disk-like diaphragm made of a flexible non-metallic relatively yieldable material and peripherally turned over upon itself to provide an everlying annular lip, means adapted to form with said diaphragm a closed pressureresponsive chamber and presenting an annular peripheral flange received between said lip and an adjacent annular portion of the diaphragm whereby said flange is throughout its peripheral extent enveloped by a portion of the diaphragm, supporting means having an annular portion to form a seat for said diaphragm on the other side from and in juxtaposition to said flange and having means radially contractible and peripherally enveloping said overturned portion of the diaphragm and said flange received therein, with means for effecting radial contraction thereof, and means responsive to radial contraction for effecting compression between said flange and the diaphragm.

12. A diaphragm motor comprising a pressure chamber, a disk-like diaphragm of yieldable nonmetallic material forming one wall of said chamber, a housing part overlying said diaphragm and cooperating with said diaphragm to form said pressure chamber, said housing part having an annular part engaging an annular portion of the diaphragm adjacent its periphery, a frame having an annular part forming a seat for the outer portion of said diaphragm adjacent its periphery, on the opposite side of the diaphragm from said housing part, whereby said annular portion of said diaphragm is interposed between two said annular parts, said diaphragm being turned over adjacent its periphery to form a lip that overlaps the periphery of the annular part of said housing part, means for wedging said overlapping lip and said annular part of said housing part and said annular frame part and said interposed annular diaphragm portion together, and means for introducing motor operating fluid into said chamber.

13. A diaphragm motor comprising a pressure chamber, a disk-like diaphragm of yieldable nonmetallic material forming one wall of said chamber, a housing part overlying said diaphragm and cooperating with said diaphragm to form said pressure chamber, said housing part having an annular part engaging an annular portion ci the diaphragm adjacent its periphery, a frame having an annular part forming a seat for the outer portion of said diaphragm adjacent its periphery, on the opposite side of the diaphragm from said housing part, whereby said annular portion of said diaphragm is interposed between two said annular parts, said diaphragm being turned over adjacent its periphery to form a lip that overlaps the periphery of one of said annular parts, sectional means peripherally encompassing said frame member and said housing part and said interposed annular portion of the diaphragm and said overlapping lip to clamp them all together in sealing relation, the sections having means for connecting them together and for coacting to effect clamping action, and means for introducing motor operating fluid into said chamber.

14. A diaphragm motor comprising a pressure chamber, a disk-like diaphragm of yieldable nonmetallic material forming one wall of said chamber, a housing part overlying said diaphragm and cooperating with said diaphragm to form said pressure chamber, said'housing part having an annular part engaging an annular portion of the diaphragm adjacent its periphery, a frame having an annular partV forming a seat for the outer portion of said diaphragm adjacent its periphery, on the opposite side of the diaphragm from said housing part, whereby said annular portion of said diaphragm is interposed between two said annular parts, said'rdiaphragm being turned over adjacent its periphery to form a lip that overlaps the periphery of the annular part of Vsaid housing part, means peripherally encompassing said assembled parts and presenting to the assembled parts cam-like means to press saidoverlapping lip and frame member and said housing part and said interposed annular diaphragm portion together, means for controlling said cam-like 12 means, and means for introducing motor operating fluid into said chamber.

15. A diaphragm motor comprising a pressure chamber, a disk-like diaphragm of yieldable nonmetallic material forming one wall of said chamber, a housing part overlying said diaphragm and cooperating with said diaphragm to form said pressure chamber, said housing part having an annular part engaging an annular portion of the diaphragm adjacent its periphery, a frame having an annular part forming a seat for the outer portion of said diaphragm adjacent its periphery, on the opposite side of the diaphragm from said housing part, whereby said annular portion of said diaphragm is interposed between two said annular parts, said diaphragm being turned over adjacent its periphery to form a lip that overlaps the periphery of the annular part of said housing part, means adapted to peripherally encompass said assembled parts and presenting thereto a cam-like recess for receiving them, said means being contractible and having means for contra'ctingit to cause the walls of said cam-like recess to compress said lip and the annular part which 'it overlaps and to cam said annular parts of said frame and said housing one toward the other and thereby also clamp the annular portion of the diaphragm between said frame and said housing, and means for introducing motor operating uid intosaid chamber.

CLIFFORD B. IVES.

REFERENCES CITED The following references are of record in the dle of this patent:

UNITED STATES PATENTS Number Klimkiewicz June 5, 1945 

